Integral structure of cotton yarn strips and a circular frame body of a mop

ABSTRACT

An integral structure of cotton yarn strips and a circular frame body of a mop, comprising: a) a circular frame body having a through hole at the center thereof, and b) a plurality of cotton yarn strips positioned at the bottom of the circular frame body. The top portion of the cotton yarn strips is arranged in an annular way within a molding cavity of the circular frame body such that the circular frame body and the top portion of the cotton yarn strips are integrally formed. A wrapping structure having a narrower bottom is created for fastening the top portion of the cotton yarn strips within the wrapping structure. In this way, the cotton yarn strips and the circular frame body can be rapidly formed for enhancing the production capacity. Moreover, the binding strength act on fibers of the cotton yarn strips  20  for a reliable connection. Therefore, the cotton yarn strips  20  are tightly secured and won&#39;t be easily loosened. As a result, the quality can be improved and the service life can be prolonged.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The invention relates to an integral structure of cotton yarn strips and a circular frame body of a mop, and more particularly to a structure that permits a rapid formation of the circular frame body and a reliable fastening of the cotton yarn strips.

2. Description of the Related Art

In the daily life, the mop is an indispensable cleaning tool. The mop includes a plurality of cotton yarn strips fastened at a mop head for absorbing the impurities and liquid on the floor. As a result, a clean floor may be achieved.

The conventional mop includes a bundle of cotton yarn strips fastened at a circular plastic head. Another conventional mop includes a plurality of the cotton yarn strips properly arranged and fastened at the end of an elongated plastic or wood stick. However, the cleaning effect of the circular plastic head mop or the elongated mop is affected to some extent since the cotton yarn strips are not easy for outspread.

Therefore, a disc type rotating mop head was developed for avoiding the above-mentioned drawbacks. The mop head is rotatable at 360 at the bottom of a handle. The cotton yarn strips are arranged in a circular way at the bottom of a circular frame. This disc type rotating mop head can really achieve the cleaning effect and enhance the practicalness. However, in producing the disc type rotating mop head, a circular frame must be made first. Meanwhile, a mounting hole is formed in the circular frame. Thereafter, the end portion of the cotton yarn strips is placed with tools into the mounting hole in a manual or semi-automatic way. Therefore, the production of the disc type rotating mop head takes much time and effort, thereby increasing the production cost and having a low production capacity. Besides, the connection between the cotton yarn strips and the circular frame is not very tight. Moreover, the operation of the disc type rotating mop head cause an unceasing rotation, thereby leading to an easy loosening of the cotton yarn strips. As a result, the quality will be reduced, and the wear and tear may be accelerated, thereby reducing the service life. Thus, a further improvement is required.

SUMMARY OF THE INVENTION

An object of the invention is to provide an integral structure of cotton yarn strips and a circular frame body of a mop wherein the cotton yarn strips and the circular frame body are integrally formed in a mold assembly, thereby achieving a rapid production. As a result, the production capacity can be enhanced and the production cost can be reduced.

Another object of the invention is to provide an integral structure of cotton yarn strips and a circular frame body of a mop wherein the end portion of the cotton yarn strips is tightly secured by a plastic circular frame body in a wrapping way such that the cotton yarn strips won't be easily loosened. Moreover, the quality can be improved and the service life can be prolonged.

In order to achieve the above-mentioned objects, the technical features in accordance with the invention include:

a) a circular frame body having a through hole at the center thereof; and

b) a plurality of cotton yarn strips positioned at the bottom of the circular frame body;

wherein the top portion of the cotton yarn strips is arranged in an annular way within a molding cavity of the circular frame body such that the circular frame body and the top portion of the cotton yarn strips are integrally formed; and

wherein a wrapping structure having a narrower bottom is created for fastening the top portion of the cotton yarn strips within the wrapping structure.

Moreover, the top surface of the top portion of the cotton yarn strips projects from the wrapping structure or is hidden within the wrapping structure.

In addition, an annular rib is formed at the internal rim of the circular frame body during the injection molding of the circular frame body. The annular rib is employed for fitting into a mounting disc, thereby creating a mop head.

Furthermore, the mop head includes a rotating plate with a projecting ear at the center thereof, and the projecting ear of the rotating plate is pivotally connected to a handle.

BRIEF DESCRIPTION OF THE DRAWINGS

The accomplishment of this and other objects of the invention will become apparent from the following descriptions and its accompanying figures of which:

FIG. 1 is a perspective view of a preferred embodiment of the invention;

FIG. 2 is an exploded perspective view of the preferred embodiment of the invention;

FIG. 3 is a cross-sectional view of a mold assembly in accordance with the invention;

FIG. 4 is a cross-sectional view of the mold assembly in accordance with the invention wherein the integral formation process is illustrated;

FIG. 5 is a top view of the invention;

FIG. 6 is a cross-sectional view taken along the line 6-6 in FIG. 5;

FIG. 7 is an enlarged view of a partial structure in FIG. 6; and

FIG. 8 is a cross-sectional view of another embodiment of the wrapping structure in accordance with the invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

First of all, referring to FIGS. 1 through 7, a preferred embodiment of the invention includes a circular frame body 10 made by the plastic injection molding process. The circular frame body 10 includes a through hole 11 at the center thereof. A plurality of cotton yarn strips 20 is positioned at the bottom of the circular frame body 10. According to the embodiment, an annular rib 12 is formed at the internal rim of the circular frame body 10. However, the formation thereof should not be restricted thereto. The annular rib 12 is employed for fitting into an annular frame 33 of a mounting disc 30, thereby creating a mop head 40. The mop head 40 includes a rotating plate 31 with a projecting ear 32 at the center thereof. The projecting ear 32 of the rotating plate 31 is pivotally connected to a handle 50, thereby forming a mop.

As shown in FIGS. 3 through 6, the top portion 21 of the cotton yarn strips 20 is arranged in an annular way within a mold assembly 60 of the circular frame body 10. According this embodiment, as shown in FIG. 3, the mold assembly 60 includes a top mold 61, a bottom mold 62, and a molding cavity 63 interposed between the top and bottom molds 61, 62. The molding cavity 63 is formed according to the shape of the circular frame body 10. The molding cavity 63 includes at least one injection feed channel 64. As shown in FIG. 4, the circular frame body 10 and the top portion 21 of the cotton yarn strips 20 are integrally formed by the injection molding process after the top portion 21 of the cotton yarn strips 20 is placed into the molding cavity 63. Then, the finished product shown in FIGS. 5 and 6 is removed from the mold assembly 60. As shown in FIG. 7, a wrapping structure 13 having a narrower bottom is created after formation of the invention. According to the embodiment, the top surface 22 of the top portion 21 projects from the wrapping structure 13, but should not limited thereto. In other words, the top surface 22 of the top portion 21 of the cotton yarn strips 20 is hidden within the wrapping structure 13 (see FIG. 8).

No matter if the top portion 21 of the cotton yarn strips 20 is arranged in a projecting way or in a hidden way, the cotton yarn strips 20 are combined by the wrapping structure 13 formed by the injection molding process. The binding strength act on fibers of the cotton yarn strips 20 for a reliable connection. Therefore, the cotton yarn strips 20 are tightly secured and won't be easily loosened.

Many changes and modifications in the above-described embodiment of the invention can, of course, be carried out without departing from the scope thereof. Accordingly, to promote the progress in science and the useful arts, the invention is disclosed and is intended to be limited only by the scope of the appended claims. 

1. An integral structure of cotton yarn strips and a circular frame body of a mop, comprising: a) a circular frame body having a through hole at the center thereof; and b) a plurality of cotton yarn strips positioned at the bottom of the circular frame body; wherein the top portion of the cotton yarn strips is arranged in an annular way within a molding cavity of the circular frame body such that the circular frame body and the top portion of the cotton yarn strips are integrally formed; and wherein a wrapping structure having a narrower bottom is created for fastening the top portion of the cotton yarn strips within the wrapping structure.
 2. The integral structure of cotton yarn strips and a circular frame body of a mop as recited in claim 1 wherein the top surface of the top portion of the cotton yarn strips projects from the wrapping structure.
 3. The integral structure of cotton yarn strips and a circular frame body of a mop as recited in claim 1 wherein the top surface of the top portion of the cotton yarn strips is hidden within the wrapping structure.
 4. The integral structure of cotton yarn strips and a circular frame body of a mop in claim 1 wherein an annular rib is formed at the internal rim of the circular frame body.
 5. The integral structure of cotton yarn strips and a circular frame body of a mop as recited in claim 4 wherein the through hole of the circular frame body includes a structure for locking a disc in place so as to creating a mop head.
 6. The integral structure of cotton yarn strips and a circular frame body of a mop as recited in claim 5 wherein the mop head includes a rotating plate with a projecting ear at the center thereof, and the projecting ear of the rotating plate is pivotally connected to a handle. 